Having worked as a duo in the first three entries of Monogram's low-budget "Trail Blazers" series, veteran Western stars Ken Maynard and Hoot Gibson were joined by Bob Steele in the fourth, Death Valley Rangers -- reportedly much to Maynard's dismay. Although not much younger than his august partners, Steele was still nimble enough to take care of the more strenuous fisticuffs and he was even somewhat believable in romantic clinches -- as opposed to his co-stars, whose ever expanding waistlines did not allow for tender scenes. This time, "The Trail Blazers," government agents, investigate a series of gold shipment thefts in Death Valley committed by a gang headed by Jim Kirk (Weldon Heyburn, whose name was misspelled "Hayburn" in the on-screen credits!). Kirk has hired a crooked scientist, Doc Thorne (Karl Hackett), who has discovered a method to pour the stolen gold back into the rock, where it will be indistinguishable from virgin ore. Steele infiltrates the gang and with the help of his partners, Death Valley is soon safe from Kirk and his gang. Like most of the "Trail Blazers" Westerns, Death Valley Rangers was filmed at Corriganville, actor Ray "Crash" Corrigan's movie ranch in Simi Valley, California.